Warp-knotting machine



June 10, 1930. o. FEESCHER ,7

WARP KNOTTING MACHINE Filed Jan. 21, 1928 4 Sheets-Sheet 1 i: Ail-Ill"||||llllllllllllllllllllll :FE.

June 10, 1930. o. FISCHER WARP KNOTTING MACHINE Filed Jan. 21, 1928 4 Sheets-Sheet 2 0 2 4 w n W DD 4 -1- 4 M m n 5 4 4 o r Z I? m: 7 5 H M .f a 6 a 6 5 6 5\ 6 W Z5 3 v M fi \IJI w II I W 1 w n n .0 3 9 a 5 m 6 a, J 5 1 m 4 5 7 m 7 w 7 0 i a 0 Iii/P14 7 7 2 4 I/ h J M 0 1 A 4 4 June 10, 1930. o. FISCHER WARP KNOTTING MACHINE Filed Jan. 21, 1928 4 Sheets-Sheet 3 June 10, 1930.

O. FESCHER WARP KNOTTING MACHINE Fil ed Jan. 21, 1928.

4 Sheets-Sheet 4 PatentedJune 10,- 1930 UNITED STAT S osmn FISCHER, or iLAUEN/VOGTLAND, GERMANY WARP-KNOTTING MACHINE Application filed January 21, 1928, Serial No. 248,366, and in Germany June 14, 1926.

My invention relates to warp knotting machines of the kind which is disclosed for instance in German Patent No. 262,452. In this machine a condition for performing the knot- 'ting operation is that the threads of the old as well as those of the new warp should be leased. The threads of the old warp have been leased by the mounting but for leasing the threads of the new warp leasing labour or a leasing machine was heretofore required.

It is an object of my invention to provide for the dividing of the warp threads to be connected an apparatus in which the leasing operation is dispensed with, the new warp being knotted with the old leased warp without its threads having been leased, so that labour as well as any mechanism for leasing are eliminated. I

W The old leased warp is prepared for knotting bymeans of drivers as described in German patent specification No. 348,993. The new, non-leased warp which extends below the old warp is delivered to a pair of clasp rods by feeding the carriage on which the machine is built up, said rods being so designed as to stretch the threads of the new warp and to prepare them for drawing while in juxtaposition.

In order to impart to the threads a definite pitch or set, an auxiliary separator is provided which during each revolution of the machine enters between the threads with a suitably shaped projection and regulates the set of the threads which initially are in close juxtaposition, so that the first thread can be engaged by the main separator which moves upwards during each revolution of the machine, engaging the first thread of the new Warp and drawing it away from the thread at its rear.

In a further stage of the operation two drivers become operative which can be displaced vertically and are arranged one to the v rear of the other. The drivers enter the gap which has been formed by the drawing oper ation between the first thread and the second thread of the new warp. One of the drivers remains stationary below the new warp so as to form a check for the old and the new warps, while the other driver moves the keyed to the shaft 13. The shaft 13 is carthread which has been engaged by the separator to the rear for about in. and places it into reach of the gripper of the knotting machine together with the drawn thread of the old warp, the first thread of the old warp having been drawn as described in German Patent No. 348,993, whereupon the knotting operation is performed in a known manner.

The drawing of the threads from the old as well as from-the new warp is under the I control of a detector which'in case of trouble, that is, when the drivers fail to engage one of the threads, or both threads, will arrest part of the mechanism or the complete apparatus. V

In the drawings afiixed to this specification and forming part thereof an apparatus embodying my invention is illustrated diagrammatically by way of example.

Fig. 1 is an elevation of the apparatus,

Fig. 2 is a rear end elevation viewed in the direction of the arrow in Fig. 1,

Fig. 3 is a front elevation shown on a larger scale,

Fig. 4 is a plan View,

Fig. 5 is a detail showing part of the detector mechanism for arresting the complete apparatus,

Fig. 6 is an elevation of the mechanism for operating the grippers.

Fig. 7 is an elevation,

Fig. 8 is a plan view of a detail of the mechanism illustrated in Fig. 5,

Fig. 9 is an elevation of a detector for arresting the complete apparatus,

Fig. 10 is a sectional plan view, and

Fig. 11 is a sectional elevation of a detector for arresting part of the apparatus only,

Figs. 12 and 13 illustratetwo positions of the clasp rods and the auxiliary separator,

Figs. 14 and 15 illustrate two positions of the main separator, and

Figs. 16 and 1'? illustrate two positions of the drivers.

The machine is built up on a carriage 5 to which feeding motion is imparted from a. pulley 104' on a shaft 13 with which it is connected by a movable pin 106 on an arm 105 the tubular holders ried in a bearing C of an upright A on the carriage 5 and imparts motion to a shaft 39 which is carried in bearings D and 31 on the upright A, through the medium of bevel gearing 37, 38. A spur gear 123 is seated on the shaft 39 and adapted to be connected with the shaft by a clutch 68, 7 0.. This spur gear meshes with a spur gear 124 on a shaft 122 which extends in parallel to the shaft 39, being carried in bearings F and G of another upright B on the carriage 5.

121 is an eccentric keyed on the shaft 122, as best seen in Fig. 2, 119 is its rod, 120 is a pin at the end of the rod 119 connecting 1t with the end of a double-armed lever 118 which is fulcrumed on the upright B at 117 and slotted at its free end 125, 116 is a pawl adapted to be adjusted in the slotted end 125, 114 is a ratchet wheel rotation is imparted by the rocking movement of the lever 118 through the medium'of the pawl 116, 113 is a spur gear connected with the ratchet wheel 114; 112 is a spur gear meshing with the spur gear 113 and seated on a pin 111; 110 is a worm wheel rigidly connected with'the spur gear 112, and 109 is a stationary rack with which the worm wheel 110 is meshing so that upon rotation of the worm wheel the carriage 5 is moved forward through a distance in proportion to ,the setting of the pawl 116 in the slot 125. 126 is a crank for moving the carriage 5 by hand. 1 is the old warp which extends above the new Warp 4. The old warp the threads of which arele'ased, is prepared for the knotting operation by means of tubular holders-2, 3, (Fig. 3) the lease bands being conducted through i 2, 3 and the first thread of the old warp 1 being able to get pastthe tubular holder 3 while the other tubular holder 2 constitutes a check for the other threads of the warp.

- By the movement of the carriage 5 a portion of the new warp 4 is carried to a pair '6' of clasp rods 7 and 8 on the carriage 5. The two horizontalrods 7 and 8 are staggeredhorizontally, and the upper edge of the lower rod 8 projects beyond the lower edge of the u er ti l? rods to be entered by the threads of the new warp 4. The edges of the rods are radiused to facilitate the entrance of the threads, the threads being slightly bent in the gap 9 so that they will move into close vicinity and become tensioned for that portion which has entered the gap. In this manner the tendency of the threads of the lower warp to climb is overcome between the rods. In

on a pin 115 to which 1 rod 7 so that a gap 9 is formed betweenspring with springs 12, 12 opposing its downward movement. 14 is a cam on the end of the shaft 39 which cooperates with a roller 15' at the top of a vertical bar 15 forming part of the reciprocating'frame on which the auxiliary separator 10 is carried. The springs 12, 12' tend to hold the roller 15' engaged with the cam 14 and when the depression of the cam moves past the roller 15', the springs 12, 12 move the frame in upward direction, and the auxiliary separator 10 engages the threads of the warp 4, 1ts projecting'end 16 entering between the threads at the rear of the first i thread at a distance of about A in. In this manner the threads in front of the projecting end 16 are pitched a slight distance apart while the threads at the rear of the pro ecting endare heldin position by such end.

When the auxiliary separator 10, 16 has performed its function, the main separator 17 starts to operate. This separator is formed at the end of the double-armed lever 50 which is fulcrumed at 18 in a bracket of the'carriage 5. Movement is imparted to the lever'by a cam 19 on the shaft 122 through the medium of a double-armed lever 50 which is fulcrumed at 50". The slotted lower end of the lever engages an arm 50 on a shaft 22 in the frame of the carriage 5. 21 is a crank on the shaft 22, and 20 is a link connecting the douhie-armed lever 50 with the crank. The free end of the separator '50 is provided with a slot 23 thewidth of which is equal to the diameter of the thread. The slot is open at the top, is bordered by a pointed tongue 25 at its so that the second thread enters the slot 23.

As the slot is inclined toward the fulcrum 18 the thread which has entered the slot is lifted beyond the other threads as shown in Fig. 15, and pitched apart vertically from the following thread.

Two drivers 26' and 27, Fig. 1, now start in operation. The driver 26 is pivoted to the end of a bell-cranklever 29, 32 which is keyed on a shaft 30 in the bearing 31 of the upright A. 33 is a connecting rod which is linked to the arm 32 at one end and to an arm 34 fulcrumed at 34" at the other end. 35 is a roller at the end ofthearm 34. 36 is a cam on the shaft 39 and 40 is a spring anchored at the bearing D and secured to the pin of the roller 35 so as to hold the roller fulcrumed to the driver 26 at 28 and provided with anangular slot 47 which is engaged byv 43 in a bracket 42. 27 is a pull-back for the gripper 27 When the rod 33 is moved to the left in Fig. 1 by the cam 36, the two drivers 26, 27 at first movevertically a pin downwards in unison as shown in Fig. 16 while the vertical reach of the slot 41 moves past the pin 43. Upon further downward movement of the drivers the driver 27 is deflected by the inclined reach of the slot 41 engaging the pin 43, as shown in Fig. 17. This is the final position 'of the drivers in which the driver 26 is still in vertical position while the driver 27 has been tilted to the right about the pin 28. In being thus tilted, the driver 27 engages the first thread of the old warp 1 which has been drawn from the other threads of the warp by means of tubular holders as described in German Patent No. 348,993, and the two first threads of the warp are pulled to the rear for about in., placing the threads within reachof a gripper at the knotting machine where knotting is effected in known manner.

It is necessary that the feeding movement of the carriage-5 should be slow in proportion to the set or number of ends per in. For instance, assume, that the set is 40 ends I g per in. It would then be necessary to repeat the separating operation forty times for a feed of 1 in. Now it may happen that the set is not quite uniform, for instance it might be 43 ends instead of 40, and the feeding of the carriage 5 must be so timed as to operate the separators 10, 17 and the drivers 26,27 not 40 but 43 times. The regulation involves idle movements and it may occur that the drivers 26. and 27 miss the threads of the upper and lower warps they ought to engage. For preventing damage in such cases, detector means are provided which, as will be described, either cause the suspension of certain functions of the apparatus or arrest the apparatus altogether.

The detector for the threads of the lower warp 4 is illustrated in Fig. 11. It is adapted to be displaced longitudinally in a tube 49 which is free to slide brackets on the carriage 5 and is so arranged and its movement is so timed with respect to the operation of drawing a warp thread that its crescentshaped' end is moved into the path of this thread and depressed at a given time. 48 is a rod in the tube 49 to which rod the detector 46 is pivoted to rock about a pin 47, and a spring, not shown, is provided which tends to move the crescent-shaped end of the detector upwards into the path of the drawn thread as shown in dotted lines in Fig. 11. 51 is a pin projecting on the outside of the tube 49 through axial slots 52 and engaged by a double-armed lever 56 fulcrumed on the upright A at 50'. Rocking movement is imparted to the double-armed lever by a cam 55 on the shaft 122.

In normal operation the thread drawn by the driver 27 from the new warp 4 forces the crescent of the detector 46 downwardly so that it can be withdrawn into the-end of the tube 49 without displacing the tube. If, in

imparted to the rod 48 by the lever 56 and is displaced to the right as indicated by the arrow in Fig. 1. Means for throwing out the tubular holders 2, 3 are connected with the tube 49 so that the holders 2, 3 are arrested upon the return stroke of the driver 27 when it has missed the thread, while the other parts of the machine move on. The throw-out mechanism comprises a lug 59 at the rear end of the tube 49 witha pin 60 which engages a slotted eye of a double-armed lever 63. The lever is fulcrumed at 62 in the upright A and its upper end is connected with a control lever 66 for the clutch 68, on the shaft 39 throu h the medium of a rod 64. The free end oft e lever 66 is forked at 67 and engagesa groove in the clutch sleeve 68 which cooperates with the sleeve 70. This sleeve is integral with the boss of the spur gear 123 on the shaft 39.

69 is a pinion which is connected to or integral with the sleeve 68, and free to rotate on the shaft39, and 69 is a pinion which meshes with a gear. Wheel 7101; a stationary pin 73. When the clutch 68, 70 is thrown in, the rotation of the shaft 39 is transmitted to the spur gear 71. The spur gear 71 serves for operating the holders 2, 3 through the medium of a crank 72 having a crank pin 74 and a connecting rod 75, Fig. 2, the slotted end 76 of which engages a pin 77 on a crank 78. The crank 78 is secured on a shaft 79, Fig. 6, from which the holders 2,3 are rotated by means of gearing 80 as shown in Fig. 3. Consequently the holders 2, 3 will be arrested when the spur gear 71 ceases rotating in consequence of the" pinion 69 having been disconnected from the shaft 39.

It will be understood that the tubular holders 2, 3 are'not opera-ted continuously but intermittently by the slotted eye of the con- 84 being provided with a rod adapted to slide in a hole 85 of a bracket at the carriage 5 and equipped with a spring 83. The catch 86 is of similar construction.

At the same time, a locking mechanism is operated by the rearward displaced of the tube 49 to arrest the reciprocation of the grippers of the knotting machine by which the two threads of the old and new warps 1, 4 are prepared for further handling by the knotting machine. As these parts now become inactive they are also unable to engage a single thread ,which may have accidentally been drawn from the old warp.

The locking mechanism for the grippers v44 comprises a lug 87 on the tube 49 which I serves for operating the grippers of the knotting machine. By these means," when the driver 27 misses a thread from the new warp 4, thetubular holders 2, 3 are arrested and the reciprocation of the gri pers 44 is also arrested as will be described elow.

r If the thread of the new warp '4 has been properly engaged but the thread of the old warp 3 has been missed, the machine is arrested by two fingers 95, 96, Fig. 9, intermediate the grippers of the knotting machine, their position bein indicated in Fig. 3. The operation of the ngers 95', 96'is similar to that ofthe detector 46, the upper finger 95 L projecting into he path of the threads of the old war 1 whi his drawn by the driver 27. The ger 95 is provided with'a hook 97 by which it may abut against the front end of a tube 98. When the driver misses the thread the finger 95 is caught at the front end of the. tube 98 and displaces it to the rear against a spring 98; 99 is a lug on the tube which upon rearward movement of, the tube engages a check 100 at an arm 101 which is free to-rock about the fulcrum 102 of the lever 92. The arm 101is provided with a pawl 103, Fig. 8, which upon the arm being moved upwards as described projects into the path of the arm V 105 which, asmentioned, is keyed on the shaft 13. The arm 105 is forked at 105, a catch 105 is pivoted in the fork at 105 and the pin 106 is secured on the end of this arm, a1aminated spring 107 being provided for holding,

the pin 106 engaged with the hole in the pulley 104. When the'p'awl 103 is placed into the path of the catch 105 its front end strikes a beveled face 108 at the end of the catch as shown in Fig. 8, so that the pin 106 is moved out of the hole in the pulley 104 against the spring 107 and the pulley 104-is free to rotate on the shaft 13 so that the apparatus is now arrested.

In this manner a duplicate supervision is provided for the threads to be conducted to the knotting machine. For instance, if a thread of the new warp 4 had been engaged but the detector 46 had been rendered inoperative by any circumstances and were unable to displace the tube 49, the fingers 95 and 96 arranged intermediate the gripper of the knotting machine would operate to automatically arrest the apparatus whereupon the trouble is remedied by drawing another thread. The finger 96 fulfills the same function as the detector 46 for the threads of the on the carriage 5 at 128, a striker 130 on the arm and a spring 131, Fig. 3, on the fulcrum 128 which tends to hold the striker 130 engaged with a check132 on one of the brack-- The ejector is controlled by a cam 133 on the pulley 104 which during each revolution of the pulley engages a roller 134 at the end of the arm 129 causing the arm to swing to the ets in which the tube 49 is adaptedto slide.

left in Fig. 1 and the striker 130 to move downwards with its hook-shaped end so as to throw away the separated thread ends;

When the cam 133 releases the arm 129, it is returned into its initial position, with the striker 130 elevated, as shown in Fig. 1, by the spring 131. Y

135 is a handle on the cam 133 bywhich the pulley 104 may be rotated by hand, if desire I wish it to be understood that I do not desire to be limited to the exact details of construction shown and described, for obvious modifications will occur to a person skilled in the art.

I claim 1. Apparatus for dividing the warp threads in warp-knotting machines comprising a movable carriage, a pair of horizontal clasp rods arranged in staggered relation so that the upper edge of the lower rod projects beyond the lower edge of the upper rod, and a gap is formed between said rods adapted to be entered by the threads of the new warp so as to bend and stretch them, an'auxiliary separator adapted to engage some threads of the new warp so as to pitch the threads in closely spaced juxtaposition, a main separator for separating the first thread, and drivers adapted to engage said first thread and to move it to the knotting machine.

2. Apparatus for dividing the warp threads in warp-knotting machines comprising a movable carriage, clasp rods for stretching the warp threads, an auxiliary separator adapted to engage some threads of the new warp so as to pitch the threads in closely spaced juxtaposition, a main separator for separating the first thread, having a rocking lever on said carriage and means for rocking said first thread of the new warp and to raise it from the other threads, and drivers adapted to engage said first thread and to move it to the knotting machine.

3. Apparatus for dividing the warp threads in warp-knottin machines comprising a movable carriage, c asp rods for stretching the warp threads,an auxiliary separator adapted to engage some threads of the new warp so as to pitch the threads in closely spaced juxtaposition, a main separator for separating the first thread, a driver, means for imparting vertical reciprocation to said driver, and for timing the movement of said driver so as to remain stationary in its lower end osition and to form a check for the threads 0 the old and new warps at its rear, a'second driver pivoted to said first-mentioned driver, and a stationary pin adapted to engage a cam-way in said second driver so as to impart rocking motion to it while it is partaking in the downward reciprocation of said first-mentioned driver.

4. Apparatus for dividing the warp threads in warp-knotting machines comprising a movable carriage, clasp rods for stretching the warp threads, an auxiliary separator adapted to engage some threads of the new warp so as to pitch the threads in closely spaced juxtaposition, a main separator for separating the first thread, drivers adapted to engage said first thread and to move it to the knotting machine, a detector, means for reciprocating said detector, a movable part adapted to move with said'detector, a rocking part pivoted to said detector and adapted to be engaged by a warp thread, means on saidrocking part for operatively connecting said detector with said movable part when said rocking part is not engaged by a thread, so as to impart movement to said movable part, tubular holders, means for operating said holders, and means operatively connected with said movable part for throwing out said holder-operating means.

5. Apparatus for dividing the warp threads in warpknotting machines comprising a movable carriage, clasp rods for stretching the warp threads, an auxiliary separator adapted to engage some threads of the new warp so as to pitch the threads in closely spaced juxtaposition, a main separator for separating the first. thread, drivers adapted to engage said first thread and to move it to the knotting machine, a detector, means for reciprocating said detector, a movable part adapted to move with said detector, a rocking part pivoted to said detector and adapted to be engaged by a warp thread, means on said rocking part for operatively connecting said detector with said movable part when said rocking part is not engaged by a thread, so as to impart movement to said movable part, tubular holders, means for operating said holders and for. carrying the threads to a gripper of the knotting machine, and means operatively connected with said movable part for throwing out said holder and thread carrying means.

6. Apparatus for dividing the warp threads in warp-knotting machines comprising a movable carriage, clasp rods for stretching the wa threads, an auxiliary separator adapted to engage some threads of the new warp so as to pitch the threads in closely spaced juxtaposition, a main separator for separating the first thread, drivers adapted to engage said 'first thread and to move it to the knotting machine, a detector, means for reciprocating said detector, a movable part adapted to move with said detector, a rocking part pivoted to said detector and adapted to be engaged by a warp thread, means on said rocking part for operatively connecting said detector with said movable part when said rocking part is not engaged by a thread so as to impart movement to said movable part, tubular holders, means for operating said holders and for carrying the threads to a gripper of the knotting machine, means operatively connected with said movable part for throwing out said holder-operating means, a lug on said movable part, a pawl adapted to cooperate with said lug, and a lug on card thread carrying means adapted to be engaged by said pawl after it has been operated by said lug so as to arrest said thread carrying means.

7. Apparatus for dividing the warp threads in warp-knotting machines comprising a movable carriage, a driving shaft on .said carriage, a pulley rotatably carried on said driving shaft, means for operatively connecting said pulley and said driving shaft, clasp rods for stretching the warpthreads, an auxiliary separator adapted to engage some threads of the new warp, a main separator for separating the first thread, drivers adapted to engage the first thread and to move it to t-he'knotting machine, means operatively connected with said driving shaft for carrying the threads to a gripper of the knot-ting machine, a detector, means for reciprocating said detector, a movable part adapted'tomove with said detector, a rocking part pivoted to said detector and adapted to be engaged by a warp thread, means on said rocking part for operatively connecting stretching" the warp threads, an auxiliary separator adapted to engage some threadsof the new warp, a main separator for separating the first thread, drivers adapted to engage the first thread and to move it to the knotting machine, a gripper,.means operatively connected with said driving shaft for operating said gripper, a detector, means for reciprocating said detector, a movable part m adapted to move with said detector, a rocking art pivoted to said detector and adapted to engaged by a Warp thread, meansoon said rocking part for operatively connecting said detector with said movable part'when said rocking part is not engaged by a thread so I as to impart movement to said movable part, and means operatively connected with said movable part for engaging said catch and for breaking its operative connection with said pulley. 1

9. Apparatus for dividing the warp threads in warp-knotting machines comprising a movable carriage, clasp rods for stretching the warp threads, an auxiliary separator adapted to engage some threads-of the new war so as to pitch the threads in closely spaced juxtaposition, a main separator for separating the first thread, drivers adapted to engage said first thread and to r move it to the knotting machine, a detector,

.means for reciprocating said detector, :1 movable part adapted to move with said detector, a rocking part pivoted to said detector and adapted to be engaged by- .a warp ahr ead,

- means on said rocking part operatively connecting said detector withsaid movable part a when said rocking part is not-engaged by a thread, so as to impart movement to said movable part, tubular holders, means for op- 40 erating said holders, m eans operatively connected with said movable part for throwing out. said holder-operating means, and a stand- 1 by detector adapted to perform the function of said first-mentioned detector when said first-mentioned detector fail's to operate.

In testimony whereof I aflix my signature. OSKAR FISCHER. 

